Reposting a question after about a dozen pages without answer.
In which games will Regigigas's Attack and Speed return to normal, should you remove Slow Start with Skill Swap, Gastro Acid, or Worry Seed?
I ask because I am getting multiple answers when I look this question up on various sites. This site, for example, has it that removing Slow Start works that way in every game except Japanese versions of Diamond and Pearl. However, Bulbapedia has it that it only works that way in PBR. I know both sites to be well-informed, so I need another opinion. I would very much like a firsthand account, if possible, and I would like to know how it works in Heart Gold / Soul Silver.